This is a common/known problem. Apparently, going on posts I read on some UK Boards, Renault in the UK are now covering the cost of replacing the dash. I don't think that is the case here yet but Renault Ireland are paying a large portion of the cost. You could ring Renault Ireland to see what they will do for you. Don't be fobbed off just because it's out of warranty; the dash should be a' lifetime of the car' part and Renault should really step up and replace these FOC.
My Scenic was in, with a Renault dealer, for other work late last year and I had my faulty dash replaced also (at a cost of €110). I wasn't overly happy to pay anything for the dash but I wanted it fixed in a hurry so I couldn't hold out for a free repair.